Behold, Paul Burridge signalled from keyed 4-1000A filament:

On Fri, 30 Apr 2004 06:56:11 GMT, Gregg wrote:

If you need that much gain, you're best off with an amp module from
Motorola or someone.

At VHF, 30mW in for 10W out will have serious stability problems if done
discretely and if not layed out just perfect.

Yeah, for simplicity the modules rule, but it's hardly in the spirit of
homebrewing, is it? Whilst it's hardly a beginner's project, I don't see
why anyone who knows what they're doing couldn't build one of these from
discretes and have a lot of fun doing so.

Quite true!

Where do you suppose most of
these "serious stability problems" are going to arise?

RF feedback between the stages is the biggest enemy. If it's well shielded
and maybe a bit of neutralization, he should have no probs then :-)

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca